Dana spent
34 of her money on 10 markers and 7 pencils. The cost of each pencil is 2 times the cost of each marker. She bought some more markers with
78 of her remaining money. How many markers did Dana buy altogether?
10 markers + 7 pencils |
Remaining amount |
Total amount |
3 p = 24 u |
1 p = 8 u |
4 p |
10 markers |
7 pencils |
More markers |
Left |
|
|
|
7 |
1 |
|
10 u |
14 u |
7 u |
|
|
Cost of 1 marker = 1 u
Cost of 1 pencil = 2 u
Cost of 10 markers = 10 x 1 u = 10 u
Cost of 7 pencils = 7 x 2 u = 14 u
Cost of 10 markers + 7 pencils
= 10 u + 14 u
= 24 u
3 p = 24 u
1 p = 24 u ÷ 3 = 8 u
Amount of remaining money that Dana spent on buying more markers
=
78 x 8 u
= 7 u
Number of markers that Dana bought with
78 of her remaining money
= 7 u ÷ 1 u
= 7
Total number of markers that Dana bought
= 10 + 7
= 17
Answer(s): 17